Gate device



E. B. TH URSTON.

"GATE DEVICE.

' APPLICATION FILED MAY I51 1918. 1,399,905. Patented Dec. 13, 1-921.

Y 3 SHEETS-SHEET i- T Fl 13.:

34 53 FIG.E 5 v E. B; THURSTON.

GATE DEVICE.

APPLICATION FILED MAY I5. 1918.

Patented D60; 13,1921.

3 SHIRTS-SHEET 2.

FIGS

lmlllarpall E. B. THURSTON,

GAT E'D EVICE. APPLICATION- FILED MAY-15,1918.

1,399,905, v Patented Dec.'13,-1921.

UNITED STATES PATENT OFFICE.

ERNEST B. THURSTON, OF TOLEDO, OHIO, ASSIGNOR TO THE HAUGHTON ELEVATORG,

MACHINE 00., OF TOLEDO, OHIO, A CORPORATION OF OHIO.

GATE DEVICE.

Specification of Letters Patent. Patented De 13 1921 Application filedMay 15, 1918. Serial No. 234,594.

To all "whom it may concern:

Be it known that I, ERNEST B. THURs- TON, of Toledo, Ohio, a citizen ofthe United States of America, have invented new and useful GrateDevices, of which the following is a specification.

This invention relates to features of gate operation.

This invention has utility when incorporated in gates or doors,especially for elevators.

Referring to the drawings:

Figure 1 is a fragmentary view of an elevator Well with a car thereininvolving features of the invention;

Fig. 2 is a plan view of the gate operating device of Fig. 1;

Fig. 3 is a diagrammatic detail view showing the starting of theoperating device in taking hold of the running line from the car gatefor slow speed starting of gate lift, the parts beingshifted from thenormal or free running position for the gate line as shown in Fig. 1;

Fig. 4 is a view similar to Fig. 3 but after passing the highintermediate travel speed for the gate and as approaching the slow speedof fully open position for the gate;

Fig. 5 is a detail view of'the car and well gates, with the car at alanding;

Fig. 6 is a view similar to Fig. 5, but with the gates partially open intheir synchronous travel;

Fig. 7 shows the two-part well gate and car gate of Fig. 5 in fully openposition;

Fig. 8 is a detail view, on an enlarged scale of the automaticconnecting device between the car gate and well gate; showing the partsin connected relation;

Fig. 9 is a view similarto Fig. 8 with the gates disconnected;

' Fig. 10 is a fragmentary transverse view of the dog carrying blockportionof the gate connecting device of Fig. 8;

Fig. 11 is a view from the landing side of the car and well gates in theposition shown in Fig. 5, that is, closed;

Fig. 12 is a view similar to Fig. 11, with the gates half open as shownin end view in Fig. 6;

Fig. 13 is a fragmentary detail view from a guide rail end of the cargate showing the safety lock for the gate as to the car;

Fig. 14 is a plan view of the device of Fig. 13; and

counterweight 8 traveling oppositely to the car 5. The car 5 is providedwith a pair of T-shaped vertically extending rails forming guides 9 forthe one-piece lift gate or door 10 therebetween, which in drop positionmay rest on the floor 11 of the car 5.

The gate 10 has near each guide 9 a bracket 12 having pivot pin 13 forshiftable member 14 having the opposing jaws 15 embracing the guide 9and normally rocked to pinch or grip such guide by compressionv spring16; However, without the spring 16, in travel of the gate 10 relativelyto the guide 9, the proximity of the jaws 15 to the guide tendsautomatically to throw the member 14 into locking position as to theguide 9 for-holding'the'gate10. For releasing this automatic 'or safetylock, normally.

acting topreclude any dropping ofthe gateas to the car, a cable 17,engages the member 14c adjacent its free end andpasses about pulley 18fixed to the gate 10, thence centrallyIof the gate 10 about gate carriedp'ulleys 19 forming therebetween a bight for the pulley block 20. Hoistline 21 connected to the block 20, in its initial pull travel lengthensthe bight between pulleys 19 of the gate connectedsection 17 of thehoist line, compressing springs 16 and thus releasing the gate 10 fortravel by taking the load or'weight of the gate 10 off the car 5. Thismain hoist line 21 for the gate has free running during cartravel bypassing up the well 1, about pulleys 22, 2'3, 24,

25, to the car counterweight 8.

The hoist line 21 is effectivefor gate operation by the interpositiontherealongof a I with speed reduction mechanism and may rotate the frame29 about 200. This frame 29 carries rollers or anti-friction guides 30,31, 32, 33, and for lifting actuation of gate 10, moves clockwise fromthe position in Fig. 1 to have the rollers 31, 32, catch the freerunning line 21. therebetween, and at 7 slow velocity initiate travel ofthe gate 10.

From this position of F ig. 3, spleeding up occurs as rollers 30,, 33,engage tie line 21. The horizontal component of this. travel of therollers 30, 33, gradually diminishes as the rollers approach theposition shown in Fig. l, thus slowing up the travel of gate 10.-beforestopping.- With this gradual pick-up, high intermediate travel rate andslow-down for stopping, there is automatically effected a smoothness inthe power actuation of gate 10, with a minimum of time interval for suchactuation. The motor 26 has automatic connections so that second throwof the controller 27 will cause the motor to operate to unwind and allowthe gate 10 to travel'downward as the effective length of the line 21from; the gate 10 to the. counterweight 8 is lengthened by the unwindingaction of frame 29 from the position shown in Fig. l, past the positionof Fig. 3 to the position of Fig. l. Accordingly in this return of gate10, it has the slow-speed start, high rate of intermediate travel andslow down just before it reaches the floor 11 of car '5. Thus coming torest on the'fioor 11, without concussion of impact, thereis minimum ofwear and tear on the mechanism, and the members 14 at once actinautomatically. locking the gate 10 closed. In the event of line 21slacking while the gate 10 is hoisted from the floor llofcar 5, or therebeing any giving away of line'21','or 1' 7, or'shorte'ning of bightbetween the 'pul'leys19, members 14 are at once released for automaticaction as safety de- "vices for gripping the guides 9 and thus holdingthe gate 10 from falling to the floor llof the car 5. V

The kinking of the line 21 by the gate operating device in the top ofthe well 1, occurs at a different portion of the line 21 for each'floor,thereby contributing to the greater length life for the line 21. Byextending this line 21 to parallel car hoist line 6, there isautomatically effected coincident "travel of the running line 21 withtravel of the car 5, and the relatively stationary operating device inits effective length varying of the line 21 always at once moves thegate as to the car; J

The gate 10 centrally is provided with the vertically extending guide 34for a block 35 having plunger 36 normally depressed against thelifting-action of spring 37 by contacting the transverse stop 38 of thegate 10. The block 35 is normally heldto have itsplunger 36 against thestop 38 by line 39 connected to the bar l0 on the car 5 and havadownwardly extending bight passing about pulley 41 carried by the block35, and thence to bar 42' adjacent bar 38 and fast with the car gate 10.This line 39 is of a length to hold the block 35 as to the bar 38 sothat the plunger 36 holds dog 43 pivotally mounted in the block 35 sothat it is retracted or rocked inward into inactive positlon.

lihen the gate 10 is moved relatively to the car 5, the night in line 39is lengthened below rail or bar 42 at half the travel rate of the gate10. in initiating this travel at half the gate speed of the block 35 ingate 10, the spring 37 throws the dog 43 out into active position forengaging projection 44: fixed upon the upper part or section 45 of thewell door. When in the inactive position, the dog 43 clears theprojection id in the movement of the car 5 up and down in the well 1.

The upper Well door or gate section 45 is connected by lines as passingover pulleys 47 to the lower counterweighting or lighter gate section aiicrgordingly in the actuation engagement travel of dog 43, each gatesection 45, 4:8, for the well, while moving at one half speed of thegate 10, is traveling synchronously therewith for simultaneously fullyopening or fully closing the two gates or doors for a common way fromthe car 5 to a landing from the well 1.

Mountedto rotate with the gate machine or driving device frame 29 is thepulley 49 having the cable 50 extending to the counterweight 5l'for thegate machine for bal-1 ancing in a measure the car gate load thereon inoperation. The well gates being disposed for one to carry the other,largely counterweight each other. The gate operation may be simultaneouson different sides of the car, by connecting line 52 in parallel withline 21.

that is claimed and it is desired to secure by Letters Patent is: a

1. A traveling gate, an operating line normally traveling with the gate,and a relatively non-traveling line embracing means normally free of theline and movable to kink the line in moving the gate.

2. An elevatorcar gate, an operating line for the gate extending fromthe car, and a relatively. non-traveling line embracing means normallyfree of the line and movable'to kink the line in moving the gate as tothe car. 7

3. A lift gate, a vertically extending rigid guide for the gate, a thirdclass lever piV- oted to swing on the gateand provided with jawsembracing the guide, a pulleycarried by the gate, and a gate actuatingcable con nected to the lever between its pivotal portion and jaws andextending about the pulley to hold the'lever'in' fixed position againstthe jaws gripping the guide.

4. An elevator car, a lift gate therefor, a guide for the gate carriedby the car,"amember pivotally mounted onthe gate and shiftabletransversely of the guide for two point opposite coaction therewith, andactuating means for the gate connected to the member for releasing thegate.

5. An elevator car, a lift gate therefor, a pair of guides for the gate,members rockable transversely of the respective guides and normallylocking the gate to the guides, connecting means between the members andhoisting means for the gate engaging the connecting means forautomatically releasing the gate for hoisting travel. by simultaneouslyshifting the members.

6. An elevator car, a gate coacting with the car, and an oscillatingmember on the gate locking the gate to the car when the gate issustained by the car independently of the position of the car as to thegate and actuating cable means flexibly connected to the member forreleasing the member from lockingposition as the cable means takes theload of the gate off the car.

7. An elevator car, a gate coacting with the car, a pair of memberslocking the gate to the car when the gate is sustained by the car, acable between the members having abight and actuating means for the gateengaging the bight to take the load of the gate off the car andautomatically release the members from locked position.

8. An elevator car, a counterweight therefor, first connecting meansbetween the car and counterweight, a gate for the car, see- 0ndconnecting means extending from the gate to the car counterweight andgate actuating means coacting with the second connecting means.

9. An elevator car, a counterweight therefor, first connecting meansbetween the car and count rweight, a gate for the car, and secondconnecting means extending from the gate to the car counterweight.

10. An elevator car, a gate for the car, a running line from the gate,and actuating means co-acting with the running line for effecting gateoperation through said line independently of car travel.

11. An elevator car, a counterweight therefor, first cable meansconnecting the car to the counterweight, a gate for the car, secondcable means connecting the gate to the counterweight, and gate actuatingm ans to vary the effective length of the second cable means between thegate and counterweight for operating the gate.

12. An elevator car, a gate for the car, a counterweight for the car,means connecting the car, gate and counterweight, and actuating meansfor the gate acting on the connecting means for varying the distancebetween the gate and counter-weight.

13. An elevator car, a car gate, a running line from the car gatenormally traveling.

with the car, and means coacting with the line for operating the gateindependently of car travel.

1%. An'elevator car, a car gate, a running line connected to the gate,and means for varying the effective length of said line for for shiftingthe means to kink the line for moving the gate.

17 An elevator car, a well therefor, a lift gate for the car, a guide inthe well as to which the car is movable, a hoist line ex;- tending fromthe gate about saidguide and connected to be actuated by car travel, andmeans movable relatively to the gate with which means the line may coactin gate hoisting travel independently of said car travel.

18. An elevator car, a lift gate therefor, a hoist line for the gate,normally inactive means mounted on the gate and controllable by thehoist line, and a well gate engageable by said means.

19. An elevator car, a car gate, a well for the car, said well having alanding, a well gate for the landing, means for actuating the car gate,a member carried by the car gate and controllable by the gate actuatingmeans to engage the well gate.

, 20. An elevator car, a car gate, a well for the car, said well havinga landing, a well gate for the landing, and gate operating mechanismincluding a member mounted on the car gate, an operating line for thecar gate having a'speed reducing connection to.

double gate therefor, and means for operv ating the double gate at halfthe rate of the single gate operation. for effecting synchronous wayclearance.

23. An elevator car, a car gate, a well for the car, said well having alanding, a two part gate for the landing, and mechanism 7 for actuatingthe gates simultaneously including means from the car gate coacting witha well gate in effecting relative movement between the car gate and oneof the parts of the well. gate.

24. An elevator car, a lift gate therefor,

car carried guides for the gate, jaw members pivoted to the gate andembracing the guides, a hoist line for the gate for pulling the memberfrom gripping the guide, and comprising a section between the membershaving an intermediate bight with which the line proper is connected, apulley providing th bight connection of the line to the section, acounterweight for the car to which the line extends normally in a singleuninterrupted bight operating as a running line during car travel, meansnormally free of the line coacting to vary the effective length of theline in effecting movement of the car gate as to the car, a well for thecar, said well having a landing, a gate for the well landing comprisingtwo sections oppositely movable vertically, and mechanism shiftable bytravel of the car gate as to the car comprising a dog for engaging awell gate section, a block on which the dog is mounted, a guide in thecar gate for the block, and a line between the ear and car gate formingbight for the block efiecting half travel rate for the block as to theear gate, and connecting means between the well gate sectionstransmitting the dog actuation travel in one direction for one sectionas opposite travel for the other section.

25. An elevator car, a car gate, hoist means for the gate, a guidecarried by the gate, a block movable in the guide, a line providing abight about the block and con necting the gate and car, a dogautomatically thrown on initial travel of (the block, and a well for theear having a two-part door, simultaneous travel effecting connectingmeans between the two parts of the well door, one of said doors beingprovided with means to be engaged by the dog whereby opening of car doormay also open the well door.

In testimony whereof I affix my signature.

ERNEST B. THURSTON.

